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  1. If you are comparing He to air or comparing any two gasses that are at the same conditions of pressure, temperature and volume then alll you need to know is what gasses you are talking about. PV=nRT...

    3 Answers · Science & Mathematics · 03/10/2008

  2. A voice sounds higher when going through helium because the helium that is vibrating from the vocal cords ...

    3 Answers · Science & Mathematics · 05/11/2012

  3. ...at least equal the house weight. The price for a cubic foot of average/low grade helium is about 10 ¢ per cubic foot. So to lift this house you need a *minimum* of 5 million cubic...

    3 Answers · Science & Mathematics · 03/12/2011

  4. 1. b 2. a 3. a

    3 Answers · Science & Mathematics · 14/05/2010

  5. pure substance: 1. gold necklace 2. helium gas 3. bleach mixture: 4.chocolate pudding 5. unfiltered tap water Most...out of one thing. Gold is gold, bleach is bleach, helium is helium . Gosh knows what chocolate pudding is made out of and what...

    4 Answers · Science & Mathematics · 19/12/2010

  6. Helium gas, He, has a mass of 4 grams per mole. Carbon dioxide gas CO2, has a mass of 44 grams per mole A mole of any gas occupies 22.4 Liters at standard temperature and pressure. STP A mole is 6.02 x 10 ^24 molecules

    2 Answers · Science & Mathematics · 05/11/2009

  7. ...so stick two pieces of thin but stiff wire, maybe 6 to 10 inches long, into the nucleus, and place an electron on the...wire. This is your model of the basic helium atom. The rest is easier. To...

    1 Answers · Science & Mathematics · 17/10/2010

  8. ...of energy production in a star. M: Red Giant = 10 . A large, bright star that is not very hot. Unused: G: Helium J: Meteor K: Neutron Star ...

    6 Answers · Science & Mathematics · 03/02/2007

  9. Hot air balloons cannot "fly" as high as helium balloons. They rely on hot air having a lower density...

    2 Answers · Science & Mathematics · 09/02/2011

  10. 4a). Adding a proton to hydrogen 2 would get you helium 3, which is stable (non radioactive). 4b). Adding 3 protons and...

    2 Answers · Science & Mathematics · 16/11/2011

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